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from django.utils import timezone
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from django.conf import settings
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from django.db import models
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from django.utils.translation import ugettext_lazy as _
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class Category(models.Model):
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name = models.CharField(max_length=64, blank=False, null=False)
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ctime = models.DateTimeField(auto_now_add=True)
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def __unicode__(self):
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return self.name
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class Announce(models.Model):
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title = models.CharField(_('title'), max_length=256,
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help_text=_('maximum 256 characters'))
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text = models.TextField(_('text'))
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publication_time = models.DateTimeField(_('publication time'), blank=True,
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null=True, default=timezone.now)
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expiration_time = models.DateTimeField(_('expiration time'), blank=True,
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null=True)
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ctime = models.DateTimeField(_('creation time'), auto_now_add=True)
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mtime = models.DateTimeField(_('modification time'), auto_now=True)
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category = models.ForeignKey('Category', verbose_name=_('category'))
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def __unicode__(self):
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return u'{title} ({id}) at {mtime}'.format(title=self.title,
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id=self.id, mtime=self.mtime)
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def is_published(self):
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if self.publication_time:
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if self.expiration_time:
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return self.publication_time <= timezone.now() < self.expiration_time
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return self.publication_time <= timezone.now()
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def is_expired(self):
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if self.expiration_time:
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return self.expiration_time > timezone.now()
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def is_not_published(self):
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return not self.publication_time
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class Meta:
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verbose_name = _('announce')
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ordering = ('-mtime',)
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class SubscriptionType(models.Model):
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subscription = models.ForeignKey('Subscription')
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identifier = models.CharField(_('identifier'), max_length=128, blank=True,
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help_text=_('ex.: email, mobile phone number, jabber id'))
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class Subscription(models.Model):
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user = models.ForeignKey(settings.AUTH_USER_MODEL, verbose_name=_('user'),
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blank=True, null=True)
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category = models.ForeignKey('Category', verbose_name=_('category'))
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class Meta:
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unique_together = ('user', 'category')
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